OCR Text |
Show by approximately 50% between 3% and 0.5% sulfur fuels when burned at the same excess oxygen level. (See Figure 8A.) Figure 16 indicates the change in acid dew-point, corrosiveness, and SO3 versus the change in excess oxygen. From the data collected it seems reasonable to conclude that this burner, when operated at a "practical excess oxygen" level of 1%, will provide low SO3 and will possibly eliminate "cold end" corrosion. Particulate We were unable to complete particulate studies prior to the printing deadline for this paper. However, we do have particulate data collected on our mechanical atomizer which would be a conservative representation of particulate emissions at low excess air conditions. It would be conservative because the actual testing on the process burner was conducted using our "Skew-Jet" steam atomizer, Figure 17, which produces a much finer spray characteristic. You will note from Figure 17A that the mechanical atomizer produced emission levels well below the .1 Lbs/MM BTU required by the Environmental Protection Agency, even when operated to 1.0% 02- (1.0% 02 is the recommended normal operating level on the process burner.) 12-38 |